Rotary brush



F. D. DOLAN ROTARY BRUSH Filed Oct. 20, 1948 2 SI-IEETS-Sl-IEET 1INVENTbR. 5-000: 0. 00/00 4 @om A WORNEYS Aug. 5, 1952 F. D. DOLAN2,605,490

I ROTARY BRUSH Filed Oct. 20, 1948 I 2 SHEETS-SHEET 2 Patented Aug. 5,l952 This invention relates to brushes, and particularly'to those -ofthe type used in connection with carpet'and floor scrubbing machines.

The primary object of the invention isthe'provision ofIan improved brushof this character that is light and strong in construction and composedoff ew parts capable ofbeing easily,

ly and economically assembled.

A- further obiect of the invention is the' 'pro vition of a rotarydisk-type brush having a stamped wit sheet metal back and a plurality ofbristle strips 1v of bar-form attached to one side thereof in asimpleand efiicientcmanner and by means which facilitates an easyand.quick ,removaland re-.

placement of the bristle members.

Further objects of the invention will be appanent from the followingdetailed description of the invention, and from the accompanyingdrawings, in which- Fig. 1 is a top plan view of the back member of abrush embodying the invention; Fig. 2 is an enlarged fragmentarycross-section thereof on the line 22 in Fig. 1; Fig. 3 is a view similarto Fig. 1 of a different form of the brush; Fig. 4 is an enlargedsection on the line 4-4 in Fig. 3; Fig. 5 is a perspective view of astraight brush, and Fig. 6 is a similar view of a curved brush.

Referring to the drawings, I is the back member of the brush stampedfrom sheet metal and preferably comprising a horizontally disposed bodyor bottom portion 2 formed with a central opening 3 and with outturnedinner and outer edge flanges 4 and 5, respectively. The inner flange 4may be provided with equidistantly spaced vertical slits or openings 6,in the present instance three in number, and fixed to and rising fromthe bottom or body portion 2 adjacent to each opening 6 is a boss orblock I. This boss, in the present instance, has its lower end reducedand fitted into a respective hole in the bottom portion 2 and welded orotherwise securely attached thereto. Each'boss also has a threadedopening 8 axially therethrough to receive a screw for attaching the backmember to a drive shaft flange (not shown) The member I is ofsubstantially flat annular channel-form and has its bottom portion 2provided on its under side with a series of concentric radially spacedannular channels In, in the present instance four in number. Thesechannels are U-shaped in cross-section and are preferably but notnecessarily of continuous annular form. In forming the channels, thebottom metal 2 is pressed upward, thus causing it to be raised above theplane of the bottom I and to form ridges II thereon corresponding to thechannels.

' brush :iiimbers ilzflzcarriembf the 'back member Icomprisearows'of'bristles I3 held togather." at theirupper I or inner;ends'. by. clamping bars I4} :These. bars areU-s'hape in' crossese'ctionto: receive theibristlesendsg and their. opposing v sides for. leg.portions "adjacent. to'theirfree: edges are pressed'inwardzto have firmgripping coaction withthexbristles; .Therends of the-bars are alsoclosed (to-retain .the bristles therein. 1 Thesebars .may be of: anydesired length,'i. and :in practice are preferably of such a lengthsthata'plurality rare'required'tobeplaced end; to end tofill a .channelialntThe bars are preferably. longitudinally curved ito. :co'nform. to thecurvatures of the channels 'iIL'WhlCh ldisposed, and their back edgesare: oft a size-:to fit; the inneron bottom portions of thechannels'while their sides recede inwardly from and project below theside walls of the chan- In the modifications shown in Figs. 3 and 4,

the two inner annular rows of brush members I2 and the receivingchannels therefor are eliminated and an annular series of diagonally ortangentially disposed brush members I8 and their receiving channels l9are substituted therefor.

These brush members I8, in the present instance, are of straightbar-form with their longitudinal axes disposed substantiallytangentially to the inner flange 4 and with some of the bars longer thanothers. This arrangement of the brush members in this form of theinvention is not necessary but merely illustrative of one convenient andpractical arrangement.

The channels J9 in which the brush members I8 are mounted form ridges orprojections 20 on 3 thereto or removed therefrom for replacement. Alsothat the entire brush is of such simple and inexpensive constructionthat when brush repairs or replacements are necessary it is practicallyas economical to substitute an entirely new brush and discard the oldone as to send the used one to the factory or other place for thenecessary repair.

I wish it understood that my invention is not limited to any specificconstruction, arrangement or form of the parts, as it is capableofnumerous modifications and changes without departing from the spiritof the claims.

Having thus described my invention, what I claim as new, and desire tosecure by United States Letters Patent, is:

1. A rotary brush comprising a, disk-form back of stiff sheet material,upstanding annular inner and outer edge flanges on said back and in the:channels and bristles clamped in said bars, anda plurality of openings,the material from the openings forming bendable retaining ears formed onsaid bottom. portion adjacent the mouth. of said channels to providereadily releasable means for retaining the bar vin position in thechannels. 1 V

2. A rotary brush comprising a disk-form back of stifi sheet material,upstanding annular inner and outer edge flanges on said back and ahorizontally disposed bottom portion therebetween,

a plurality of substantiallyv concentric channels stamped in saidbottom. portion, brush units of :a horizontally disposed bottom portiontherebetween, a pluralityof channels stamped in said bottom portion,brush. members positioned in the channels. and comprising bars shaped tofitwithsegmental form mounted in the channels and comprising bars shapedto fit within the channels and bristles clamped in said bars, and aplurality of openings, the material from the openings forming bendableretaining ears located in opposed relationship at spaced intervals alongthe mouth of said channels in said bottom portion and adjacent theretoto effect readily releasable opposed clamping engagement with thebristle bars.

FRANCIS D. DOLAN.

' REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS France Oct. 20, 1931

